[edit] Round-to-even method This method, also known asunbiased rounding,convergent rounding,statistician's rounding,Dutch rounding,Gaussian rounding, orbankers' rounding, exactly replicates the common method of rounding except when the digit(s) following the rounding digit starts with a five and has...
rounding参数取值ROUND_HALF_UP, from decimal import Decimal, ROUND_HALF_UP In [127]: Decimal("3.124").quantize(Decimal("0.00"), rounding=ROUND_HALF_UP) Out[127]: Decimal('3.12') In [128]: Decimal("3.125").quantize(Decimal("0.00"), rounding=ROUND_HALF_UP) Out[128]: Decimal('3.13')...
方法/步骤 1 round简介round(number[, ndigits])对浮点数进行近似取值，保留几位小数。第一个参数是一个浮点数，第二个参数是保留的小数位数，可选，如果不写的话默认保留到整数 2 round用法举例>>> round(1.34)1>>> round(1.34,1)1.3>>> round(-1.34)-1>>> round(-1.34,1)-1.3>>> rou...
方法二、使用round内置函数(会四舍五入) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 s=12.345a=round(s,2)print(a)#12.35s=12.3445a=round(s,2)print(a)#12.34 方法三、 使用decimal模块(四舍五入) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 from decimalimportDecimal s=12.3445a=Deci...
首先导入decimal模块 from decimal import Decimal, ROUND_HALF_UP 1. rounding参数为ROUND_HALF_UP In [127]: Decimal("3.124").quantize(Decimal("0.00"), rounding=ROUND_HALF_UP) Out[127]: Decimal('3.12') In [128]: Decimal("3.125").quantize(Decimal("0.00"), rounding=ROUND_HALF_UP) ...
参考链接: Python int() 猛的一看 int() round() math.floor() 这几个函数函数好像做的是同一件事情,很容易将他们弄混,下面是他们的一些不同之处: int()函数直接截去小数部分...floor() 得到最接近原数但是小于原数的部分round()得到最接近原数的整数(返回为
python2和python3的doc中都举了个相同的例子,原文是这么说的: NoteThebehavior of round()forfloats can be surprising:forexample,round(2.675,2)gives2.67instead of the expected2.68.Thisisnota bug:it’s a result of the fact that mostdecimalfractions can’t be represented exactlyasafloat.SeeFloatingPoi...
通常使用 decimal 的方式是先导入该模块,通过 getcontext() 查看当前上下文,并在必要时为精度、舍入或启用的陷阱设置新值: >>> from decimal import * >>> getcontext() Context(prec=28, rounding=ROUND_HALF_EVEN, Emin=-999999, Emax=999999, capitals=1, clamp=0, flags=[], traps=[InvalidOperation,...
Here, we will create a list of floats that will be converted to integers in this tutorial. In your preferred Python IDE, run the line of code below.float_list = [1.2, 3.4, 5.6]As seen, the list of floats was created by concatenating three decimals in a square bracket and named as ...
1.round()内置方法 这个是使用最多的，刚看了round()的使用解释，也不是很容易懂。round()不是简单的四舍五入的处理方式。Forthebuilt-intypessupportinground(),valuesareroundedtothe closestmultipleof10tothepowerminusndigits;iftwomultiplesareequally close,roundingisdonetowardtheevenchoice(so,for...